Cuttings bed thickness analysis of high angle deviated well and horizontal well in Jidong Oilfield

The problem on cuttings bed accumulated easily by cuttings particle at low boundary of well wall in high angle deviated well and horizontal well while drilling in Jidong Oilfield,results in underground troubles and influencing subsequent operation.Aiming at the problem,whether underground annular cuttings bed forms,its thickness size and the main factors influencing carrying rock effect of drilling fluid such as well decline,annular velocity and performance of well drilling fluid,eccentricity and rotation of drill pipe,and so on are studied.Thickness calculation model of annular cuttings bed,by which high 104 flat 56 well in Jidong Oilfield is analyzed concretely is established.It shows that,the prediction for minimum displacement accesses to actual displacement on second open drilling in so the drilling process is relative safe.Actual displacement of upper second open well segment far lower than forecasting minimum displacement in third drilling in leads to this cuttings bed in dangerous state.Furthermore,the calculation results of cuttings bed thickness calculation model established are consistent with actual situation so the model application may provide reference for field constructors knowing underground cuttings bed thickness.